Really hoping they'll open source the Picasa application or something, it was really the best in the business - I still recommend it to people regularly. Managing digital photos any other way I've seen is just too complicated for average users.
Other than that I can only recommend they go to Lightroom or one of several open source applications which are at varying stages of completion and usability (I haven't played with any recently so if anyone knows a particularly polished one that runs on Windows let me know). All of the alternatives are more difficult to use than Picasa. This really sucks.
what open source options have you tried? I tried Lightroom, but it repeatedly barged and corrupted it's library while importing on my rather old MacBook.
I never was a fan of Picasa because it always felt and looked janky on a Mac. (Specifically, no drag-n-drop between apps.) I only started using it after iPhoto collapsed under its own weight. I thought about switching back to Apple Photos, but all that white space and mobile design feels weird on a screen with a 2 digit diagonal size. Google Photos is a nonstarter because I'm not comfortable all my photos to Googke and then paying to access them.
Other than that I can only recommend they go to Lightroom or one of several open source applications which are at varying stages of completion and usability (I haven't played with any recently so if anyone knows a particularly polished one that runs on Windows let me know). All of the alternatives are more difficult to use than Picasa. This really sucks.